Cooling Screw Cranks Up Foam Output.
A new screw screw, simple machine consisting essentially of a solid cylinder, usually of metal, around which an inclined plane winds spirally, either clockwise or counterclockwise. design for foam extrusion is believed to be the first
to use cross-flight melt channels to increase cooling and foam output.
The channels perforating the curved flights scoop hot polymer off the
screw root and bring it into contact with the cooled barrel. In the
single-screw cooling extruder of a tandem (Tandem Computers Inc., Cupertino, CA) A former major manufacturer of fault-tolerant computers founded in 1974 by James Treybig and provider of the early 21st century technology for HP's enterprise computing strategy. foam line, it reportedly
increases output by 25-40%. Developed and patented by Plastic
Engineering Associates Inc., Boca Raton Boca Raton (bō`kə rətōn`), city (1990 pop. 61,492), Palm Beach co., SE Fla., on the Atlantic; inc. 1925. Boca Raton is a popular resort and retirement community that experienced significant industrial development in the 1970s and 80s. , Fla., The Turbo-Cool screw was
discussed publicly for the first time at the SPE SPE - Software Practice and Experience ANTEC meeting in Dallas
in May, though it is already used commercially by several large
producers of PS-foam sheet for clamshells and board for construction.
COPYRIGHT 2001 Gardner Publications, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2001, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.
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